diff --git a/twain/twain/huagaods.cpp b/twain/twain/huagaods.cpp
index c476cb4..5c9651e 100644
--- a/twain/twain/huagaods.cpp
+++ b/twain/twain/huagaods.cpp
@@ -1569,7 +1569,7 @@ void huagao_ds::init_support_caps(void)
 		if (!scanner_.get())
 			return seqError();
 		std::vector<int>	values;
-		value_limit	limit = VAL_LIMIT_ENUM;
+		value_limit	limit = VAL_LIMIT_RANGE;
 		int init = 0, now = 0;
 		GET_SANE_OPT(int, scanner_, resolution, &now, &init, &values, NULL);
 		switch (msg) {